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Description

19/33kV Single Core un-armoured XLPE insulated cables

Standards

International :
IEC 60502National :
BS 7870-4.10

Description

Important Note: this information is for general guidance only, based on standard design options. Exact data will vary based upon the options required, and therefore a full data sheet for the exact design should be requested prior to any order.

Voltage Rating:

19/33 (36) kV

Typical Constructions:

Conductors

Stranded Copper or

Stranded Aluminium

Option - water swellable powders or tapes

Conductor Screen

SC XLPE

Insulation

XLPE

Insulation Screen

Bonded SC XLPE

Option - cold strippable SC XLPE

Paper separation Tapes

Option - water swellable tapes

Copper Wire Screen

Number and diameter of wires dependant upon required earth fault rating

Option - copper equalising tapes applied helically

Sheath

Black MDPE

Option - LSOH material

Sheath embossed or indented with year of manufacture, size and type of conductor and voltage in accordance with design standard employed

Option - sequential metre marking

Docs and info

Typical Data for cables with Copper conductors

Nominal cross-sectional area

mm²

70

95

120

150

185

240

300

400

500

630

800

1000

Approximate diameter over conductor

mm

9.8

11.5

12.8

14.3

15.9

18.4

20.5

23.2

26.2

30.3

34.7

38

Approximate diameter over insulation

mm

27

28.7

30

31.5

33.1

35.6

38.1

41.2

44.2

48.3

52.7

57.3

Approximate overall diameter

mm

34.1

36.1

37.5

39.3

41

43.8

46.6

50.2

53.4

58

66

71

Approximate weight of Cable

kg/m

1560

1880

2160

2480

2860

3530

4220

5150

6250

7740

9630

12200

Minimum bending radius (static)

mm

340

360

380

390

420

440

470

500

540

580

660

710

Maximum pulling tension on Cable

kg

350

475

600

750

925

1200

1500

2000

2500

3150

4000

5000

Maximum DC resistance (R) @ 20°C

W/km

0.268

0.193

0.153

0.124

0.0991

0.0754

0.0601

0.047

0.0366

0.0283

0.0221

0.0176

Maximum AC resistance (R’) @ 90°C

W/km

0.342

0.247

0.196

0.159

0.128

0.098

0.079

0.063

0.051

0.042

0.035

0.03

Inductance (L) @ 50Hz @ 90°C

mH/km

0.43

0.41

0.4

0.38

0.37

0.36

0.36

0.33

0.32

0.31

0.3

0.29

Approximate Capacitance (C)

µF/km

0.14

0.16

0.17

0.18

0.2

0.22

0.25

0.26

0.29

0.32

0.35

0.38

Short circuit ratings

1 Second Short Circuit Ratingof Conductor (90 to 250°C)

kA

9.7

13.5

17.1

21

26.3

34.6

43.4

57.7

72.1

90.7

115.1

143.8

1 Second Short Circuit Rating of a 35mm2 Copper wire screen (80 to 250°C)

kA

4.8

4.8

4.8

4.8

4.8

4.8

4.8

4.8

4.8

4.8

4.8

4.8

1 Second Short Circuit Rating of a 50mm2 Copper wire screen (80 to 250°C)

kA

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

Current Carrying Capacity (cables laid in trefoil)

Direct Buried

A

270

320

360

410

460

530

600

690

760

850

930

1010

Single way ducts

A

270

320

360

405

445

520

570

630

700

780

860

920

In Air

A

320

390

445

510

580

680

770

890

1020

1160

1290

1430

Values for minimum bending radius are multiplied by two for cables being laid (dynamic)